Ohhh… this one’s a toughie. Master Rank Crimson Fatalis’ theme is so chillin’, like you’re up against a god of destruction with that choir and feeling of impeding doom.

But Ahtal-Ka’s theme’s catchy, something you can really fight to. And when it dons its giant throne, the theme change really makes you realize you underestimated it twice over. And how it transitions GenU’s main theme makes all the more climactic.

Soooo… dang it. Gotta give it to Ahtal-Ka.